condition mean min max 4 h after light 53.7 53.7 53.7 8 h after light 64.85 47.4 82.3 12 h after light 131.15 71.9 190.4 4 h after dark 171.8 89.7 253.9 8 h after dark 147.2 139.1 155.3 12 h after dark 260.5 213.8 307.2